. Parasites and parasitosis of the domestic animals : the zoo?logy and control of the animal parasites and the pathogenesis and treatment of parasitic diseases . Domestic animals. 328 PARASITES (3F THE DOMESTIC ANIMALS diarrhea, and ansniia. Toward the end weal-cnc^ss has so far advanced that the affected birds are completely helpless and lie with their heads upon the ground. Those which survive are said to be immune to fur- ther attack. The spiroochete sometimes penetrates the red blood cells; it has also been found in the eggs and in the embryonal epithelium of the chick. It is not known wit
. Parasites and parasitosis of the domestic animals : the zoo?logy and control of the animal parasites and the pathogenesis and treatment of parasitic diseases . Domestic animals. 328 PARASITES (3F THE DOMESTIC ANIMALS diarrhea, and ansniia. Toward the end weal-cnc^ss has so far advanced that the affected birds are completely helpless and lie with their heads upon the ground. Those which survive are said to be immune to fur- ther attack. The spiroochete sometimes penetrates the red blood cells; it has also been found in the eggs and in the embryonal epithelium of the chick. It is not known with certainty that the disease exists in this country. It is not unlikely, however, that some of the as j'et ol«cure diseases. Fig. 170.—Hen suffering from acute spirochetosis (after Crawley, from Balfour, Cir. No. 194, Bu. An. Ind., U. S. Dept. Agr.). of poultry may be found to be due to members of the spirochete group, —a sufficient reason for mentioning the Brazilian spirochetosis here. Order II. Trypanosomatida Flagellata (p. 326). A number of classifications have been proposed for these organisms, Salmon and Styles placing them in the order Monadida (Moore, 1906). Calkins (1909) classifies them as follows: Subphylum Mastigophora; class, Zo5mastigophora; subclass, Lissoflagellata; order, Trypanosoma- tida; typical genera, Trypanosoma and Trypanoplasma. The same author thus describes the order in tabulation: "Organisms of elongate, usually pointed form, and of parasitic mode of life; with one or two flagella arising from a special "motor" nucleus, and with an undulating membrane provided with myonemes running from the kinetonucleus to the extremity of the cell; one of the flagella is attached to the edge. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Underhill, Benjamin Mott. New York
Size: 2068px × 1208px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectdomesti, bookyear1920
